<ng-container>
    <div class="task-property-selection">
        <p>请选择平台架构：</p>
        <div class="col-md-10 col-xl-4">
          <mat-form-field class="mat-form-field-fluid"> 
            <mat-select  [(ngModel)]="architectureModel" (ngModelChange)="change()" name = 'architectureModel'> 
              <mat-option *ngFor="let option of architecture" [value]="option">
                {{ option }}
              </mat-option>
            </mat-select>
          </mat-form-field>
          
        </div>
      </div>
      <div class="task-property-selection" >
        <p>请选择更新的包：</p>
        <div class="col-md-10 col-xl-4">
          <mat-form-field class="mat-form-field-fluid"> 
            <mat-select  [(ngModel)]="packageModel" name = 'packageModel'> 
              <mat-option *ngFor="let option of packages" [value]="option">
                {{ option }}
              </mat-option>
            </mat-select>
          </mat-form-field>
          
        </div>
      </div>  
</ng-container>